Different views of one specimen taxed as Gyroidina orbicularis by Loeblich and Tappan, Treatise on Invertebrate Paleontology, Part C Volume 2 taxed as Gyroidina soldanuu girardana by ARBEITSKREIS DEUTSCHER MIKROPALäONTOLOGEN (1962): Leitfossilien der Mikropaläontologie